Alamosa, CO Climate

Summary Graph

The summary climate graph for Alamosa, CO shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Alamosa, CO.


The warmest month in San Luis Valley Regional Airport, Alamosa, Colorado is July with an average high temperature of 83.0°F. The hottest day on record was June 26 1994 when the temperature hit 93.9°F. During January the overnight temperature drops to an average of -1.4°F with the lowest temperature of -42.2°F being recorded on December 8 1978.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

26 Jun 199493.9°F
7 Jun 201093.9°F
5 Jul 198993°F
29 Jun 199093°F
15 Jul 200393°F

The warmest months on average were:

July 200389.3°F
July 201188.3°F
June 201287.5°F
July 200287.2°F
July 200587°F

The coldest days on record are:

8 Dec 1978-42.2°F
19 Jan 1984-40°F
31 Jan 1979-39.1°F
24 Dec 1990-33.2°F
30 Dec 2007-33°F

The coldest months on average were:

January 1984-17.2°F
January 1992-15.1°F
January 1988-14°F
January 2008-13.3°F
January 1973-11.5°F


The wettest month in Alamosa, CO is August with an average of 1.3 inches of rain falling on 11 to 12 days. The driest month in Alamosa, CO is January with an average of 0.3 inches of rain falling on 0 to 1 days.

Wettest Days

The wettest days on record are:

13 April 19760.9 inches
13 April 19870.7 inches
5 April 19960.6 inches
13 April 20090.6 inches
29 April 19850.5 inches

Wettest Months

The wettest months on record are:

August 199314.7 inches
July 199313.6 inches
June 199312 inches
May 199311.2 inches
September 199210.8 inches

Driest Months

The driest months on record are:

January 19810 inches
June 19800 inches
May 19750 inches
October 19830 inches
January 19860 inches